Analog telephone calls degraded with distance; digitizing communications allowed errors to be detected and corrected, leading to the Internet. Analog computations degraded with time; digitizing computing again allowed errors to be detected and corrected, leading to microprocessors and PCs. Manufacturing today remains analog; although the designs are digital, the processes are not. I will present emerging research on digitizing fabrication by coding the construction of functional materials, and explore its implications for programming the physical world.